import-module.py

def my_import(name):
    mod = __import__(name)
    components = name.split('.')
    for comp in components[1:]:
        mod = getattr(mod, comp)
    return mod

Then you can do:

mod = my_import('package.' + name)
mod.doSomething()

importlib.py

from importlib import reload  # Python 3.4+
import foo

while True:
    # Do some things.
    if is_changed(foo):
        foo = reload(foo)

load-module.py

def loadModules():
    res = {}
    import os
    # check subfolders
    lst = os.listdir("services")
    dir = []
    for d in lst:
        s = os.path.abspath("services") + os.sep + d
        if os.path.isdir(s) and os.path.exists(s + os.sep + "__init__.py"):
            dir.append(d)
    # load the modules
    for d in dir:
        res[d] = __import__("services." + d, fromlist = ["*"])
    return res
  
  def getClassByName(module, className):
    if not module:
        if className.startswith("services."):
            className = className.split("services.")[1]
        l = className.split(".")
        m = __services__[l[0]]
        return getClassByName(m, ".".join(l[1:]))
    elif "." in className:
        l = className.split(".")
        m = getattr(module, l[0])
        return getClassByName(m, ".".join(l[1:]))
    else:
        return getattr(module, className)
    
    
mods = loadModules()
cls = getClassByName(mods["MyModule"], "submodule.filepy.Class")
obj = cls()